Load rejection system of underwater equipment

Abstract

The invention discloses a load rejection system of underwater equipment. The load rejection system comprises an acoustic releaser, an electrochemical load rejection device, a load rejection executing mechanism and a tensioner. The acoustic releaser receives an acoustic instruction to execute load rejection, and the electrochemical load rejection device executes load rejection through electrochemical corrosion fusing in seawater; the load rejection device and the load rejection device are connected in series through a load rejection rope and are connected with a load rejection block; in the system, an acoustic releaser and an electrochemical load rejection device form a parallel redundant structure, and a rope can be loosened to release a load rejection block when any device triggers load rejection. The device has the remarkable advantages that the uncertainty of a traditional acoustic releaser affected by the environment and the defects of an electromagnetic load rejection device are overcome, emergency load rejection can be achieved when the acoustic releaser fails, timely recovery can be achieved after work is completed, timing, event and emergency load rejection can be achieved through the electrochemical load rejection device, the safety, practicability and reliability of underwater equipment are improved, and the device is suitable for popularization and application. And the application range is wide.

Description

Technical Field

[0001] The present invention relates to underwater equipment, in particular to a jettisoning system of underwater equipment. Background Art

[0002] Commonly used underwater platforms are either cabled or cable-free. Cabled deep-sea platforms, such as the Rosette, use ship-mounted cables for lowering and retrieval. Cable-free platforms typically do not have external cables, but instead lower and rise by adjusting their own gravity and buoyancy.

[0003] A deep-sea lander is a cable-free deep-sea platform that is widely used in fields such as marine environmental monitoring and resource acquisition. It has the characteristics of flexible use, low cost, safety and reliability. Traditional landers generally use acoustic releasers as jettisoning devices, but acoustic signals are easily affected by environmental factors such as obstruction and noise during transmission, and there is uncertainty. Connecting multiple acoustic releasers in series can improve reliability, but the corresponding cost is relatively high. In order to safely recover the lander, two jettisoning devices with different operating modes are required. The existing electromagnetic jettisoning device uses an electromagnetic coil to generate a magnetic field to hang the ballast weight on the underwater platform, and releases it when the power is cut off. However, this type of device is large in size, high in cost, and has a large static power consumption during long-term operation.

[0004] It should be noted that the information disclosed in the above background technology section is only used to understand the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] The main purpose of the present invention is to overcome the defects existing in the above-mentioned background technology and provide a jettisoning system for underwater equipment.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A jettisoning system for underwater equipment, comprising: Acoustic releaser, installed on underwater equipment, used to receive acoustic commands to execute load jettisoning; Electrochemical load-rejection device, installed on underwater equipment, used to perform load rejection by fusing through electrochemical corrosion in seawater; The load-jeopardizing actuator comprises a connected load-jeopardizing rope and a load-jeopardizing block; the acoustic releaser and the electrochemical load-jeopardizing device are connected in series via the load-jeopardizing rope and are connected together to the load-jeopardizing block; A tensioner connected to the throwing rope and used to tighten the throwing rope before throwing; The acoustic releaser and the electrochemical load-releasing device form a parallel redundant structure. When any one of the devices triggers the load-releasing action, the load-releasing rope will be relaxed, thereby releasing the load-releasing block.

[0007] Furthermore, the electrochemical load dumping device comprises a watertight cable, an electrode and a fuse structure made of a conductive material that can undergo electrochemical corrosion; The electrodes and the fuse structure are respectively connected to a power source via watertight cables, and the fuse structure is provided with an exposed fuse point and is connected to a load-throwing rope; When powered on, current flows from the watertight cable to the electrode and the fuse structure, and the two form a conductive loop through seawater, causing electrochemical corrosion and melting of the fuse point, so that the load-releasing rope relaxes and releases the load-releasing block.

[0008] Furthermore, the fuse structure is a stainless steel wire with an anti-corrosion layer, and the fuse point is formed by partially removing the anti-corrosion layer. The watertight cable includes a first watertight cable, and the first watertight cable is vulcanized to lead out two cable lines, one of which is vulcanized and connected to the electrode, and the other is directly connected to the single end of the stainless steel wire.

[0009] Furthermore, the fuse structure is a steel wire rope with an anti-corrosion layer, and the fuse point is formed by partially removing the anti-corrosion layer; the watertight cable includes a first watertight cable and a second watertight cable, the first watertight cable is vulcanized to lead out two cable lines, one is vulcanized and connected to the electrode, and the other leads out a watertight joint and is connected to the second watertight cable, and the ends of the steel wire rope are fixed by vulcanization and connected to the second watertight cable.

[0010] Furthermore, the fuse structure is configured in a ring shape and is respectively connected to the tensioner and the underwater equipment body through the two insulating connectors.

[0011] Furthermore, the material of the electrode is brass, stainless steel or titanium alloy.

[0012] Furthermore, the electrochemical load dumping device is configured to trigger power on in response to a timing signal, an external control signal or a system abnormality monitoring signal.

[0013] Furthermore, the acoustic releaser is installed on the top of the underwater equipment, and the electrochemical load-releasing device is installed on the middle layer of the underwater equipment.

[0014] Furthermore, the load-jerk actuator further comprises a load-jerk block release hook and a release hook seat; The release hook seat is fixed on the support column of the underwater equipment, and the release hook of the throwing block is installed on the release hook seat through a lever structure, so that when the throwing rope is tensioned, the tension borne by the throwing rope is less than the gravity of the throwing block through the lever action.

[0015] Furthermore, the load-dumping actuators are provided in multiple groups and distributed on multiple support columns of the underwater equipment.

[0016] The present invention has the following beneficial effects: This invention provides a jettisoning system for underwater equipment. It can enable emergency release and buoyancy of underwater equipment (such as deep-sea landers) in the event of an acoustic releaser failure, or timely recovery after the underwater equipment is completed. The main technical advantage of this invention lies in its significantly improved reliability through the parallel redundant design of the acoustic releaser and the electrochemical jettisoning device. If the acoustic releaser fails due to environmental interference, the electrochemical device automatically triggers a fuse based on a timed command, system signal, or abnormality monitoring, enabling emergency jettisoning and buoyancy. Furthermore, the electrochemical fuse mechanism (an electrode and fuse structure form a circuit through seawater electrolysis) replaces the traditional electromagnetic device, eliminating static power consumption and significantly reducing size and cost. This overcomes the drawbacks of existing electromagnetic jettisoning devices, such as their bulk, high cost, and high static power consumption. This system is compatible with all underwater equipment that relies on weight-buoyancy regulation, combining deployment flexibility, operational economy, and recovery safety, fundamentally addressing the risk of stranding untethered platforms such as deep-sea landers due to single-point failures.

[0017] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the multi-stage safety jettisoning system for underwater equipment according to an embodiment of the present invention.

[0019] Figure 2 This is a front view of the jettisoning system of underwater equipment according to an embodiment of the present invention.

[0020] Figure 3 This is a design principle diagram of an electrochemical load rejection device according to an embodiment of the present invention.

[0021] Figure 4 This is a design principle diagram of an electrochemical load rejection device according to another embodiment of the present invention.

[0022] Figure markings: 1 acoustic releaser, 2 throwing load rope, 3 throwing load block release hook, 4 throwing load block release hook seat, 5 throwing load block, 6 tensioner, 7 electrochemical throwing load device, 7-1 first watertight cable, 7-2 electrode, 7-3 fuse point, 7-4 insulating connector, 7-5 stainless steel wire, 7-6 second watertight cable, 7-7 wire rope. DETAILED DESCRIPTION

[0023] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present invention and its application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and coupling or communication.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] See Figures 1 to 4 An embodiment of the present invention provides a jettisoning system for underwater equipment, comprising an acoustic releaser 1, an electrochemical jettisoning device 7, a jettisoning actuator, and a tensioner 6. The acoustic releaser 1 is installed on underwater equipment, such as a deep-sea lander, and is used to receive acoustic instructions to execute jettisoning; the electrochemical jettisoning device 7 is installed on underwater equipment and is used to execute jettisoning by causing electrochemical corrosion in seawater and fusing; the jettisoning actuator comprises a connected jettisoning rope 2 and a jettisoning block 5; the acoustic releaser 1 and the electrochemical jettisoning device 7 are connected in series via the jettisoning rope 2 and are connected together to the jettisoning block 5; the tensioner 6 is connected to the jettisoning rope 2 and is used to tighten the jettisoning rope 2 before jettisoning; the acoustic releaser 1 and the electrochemical jettisoning device 7 form a parallel redundant structure, and triggering the jettisoning action by either device causes the jettisoning rope 2 to relax and release the jettisoning block 5.

[0028] See Figures 3 and 4In some embodiments, the electrochemical jettison device 7 comprises a water-tight cable, an electrode 7-2 and a fuse structure made of conductive material that can be electrochemically corroded; the electrode 7-2 and the fuse structure are connected to a power source through a water-tight cable respectively, the fuse structure is provided with an exposed fuse point 7-3 and connected to the jettisoning rope 2; when powered, the current flows from the water-tight cable to the electrode and the fuse structure, and a conductive loop is formed through seawater, causing the fuse point to be electrochemically corroded and fused, so that the jettisoning rope 2 is relaxed and the jettisoning block 5 is released.

[0029] Referring to Figure 3 In some embodiments, the fuse structure is a stainless steel wire 7-5 with a corrosion-resistant layer, and the fuse point 7-3 is formed by locally removing the corrosion-resistant layer; the water-tight cable comprises a first water-tight cable 7-1, and the first water-tight cable is vulcanized to lead out two cable lines, one of which is connected to the electrode by vulcanization, and the other of which is connected to the stainless steel wire 7-5 directly at one end.

[0030] Referring to Figure 4 In some embodiments, the fuse structure is a steel wire rope 7-7 with a corrosion-resistant layer, and the fuse point 7-3 is formed by locally removing the corrosion-resistant layer; the water-tight cable comprises a first water-tight cable 7-1 and a second water-tight cable 7-6, the first water-tight cable is vulcanized to lead out two cable lines, one of which is connected to the electrode by vulcanization, and the other of which is connected to the second water-tight cable through a water-tight joint, and the steel wire rope 7-7 is connected to the second water-tight cable through vulcanization at both ends.

[0031] Referring to Figures 1 to 4 In some embodiments, the fuse structure is configured in a ring shape and connected to the tensioner 6 and the underwater equipment body through two insulation connectors 7-4 respectively.

[0032] In some embodiments, the material of the electrode 7-2 is brass, stainless steel or titanium alloy.

[0033] In some embodiments, the electrochemical jettison device 7 is configured to be triggered to be powered in response to a timing signal, an external control signal or a system abnormality monitoring signal.

[0034] Referring to Figure 2 In some embodiments, the acoustic release device 1 is installed on the top of the underwater equipment, and the electrochemical jettison device 7 is installed on the middle layer of the underwater equipment.

[0035] Referring to Figure 2In some embodiments, the jettisoning actuator further includes a jettisoning block release hook 3 and a release hook holder 4. The release hook holder 4 is fixed to the support column of the underwater equipment, and the jettisoning block release hook 3 is mounted on the release hook holder 4 via a lever structure. This allows the lever to reduce the tension on the jettisoning block 5 when the jettisoning line 2 is tensioned. This lever-type jettisoning actuator design optimizes mechanical efficiency, ensuring reliable release with low power consumption.

[0036] See Figure 2 In some embodiments, the load-dumping actuators are arranged in multiple groups and distributed on multiple support columns of the underwater equipment.

[0037] The underwater equipment jettisoning system of the present invention is designed with the jettisoning functions of an acoustic releaser and an electrochemical jettisoning device connected in parallel. By triggering the jettisoning through either device, the rope is relaxed, thereby achieving safe recovery of the lander. This improves the jettisoning reliability and can cope with situations such as failure of the acoustic releaser. In addition, the electrochemical jettisoning device can realize multiple jettisoning modes and has a wide range of applications.

[0038] Specific embodiments of the present invention are further described below.

[0039] The underwater equipment jettisoning system of the embodiment is as follows Figures 1 to 4 As shown, acoustic releaser 1 is mounted on top of the deep-sea lander, in an unobstructed area. One end of tensioner 6 is connected to jettison block 5 via jettison rope 2 through acoustic releaser 1. Electrochemical jettison device 7 is installed in the lander's mid-layer. Its annular fuse structure is connected to the other end of tensioner 6 and the lander itself via two plastic connectors (insulating connector 7-4). The rope is tightened by tensioner 6. Jetting rope 2 can be made of high-strength Kevlar rope.

[0040] There are four groups of jettisoning blocks 5, which are respectively arranged on the four support columns of the lander; the jettisoning part is mainly composed of a jettisoning block release hook 3, a jettisoning rope 2, a release hook seat 4 and a jettisoning block 5, wherein the release hook seat 4 is welded to the support column of the lander. The jettisoning block release hook 3 passes through the release hook seat 4, and through the lever action, the tension required for the rope is only a fraction of the weight of the jettisoning block 5. In this embodiment, the jettisoning block 5, the acoustic releaser 1, the tensioner 6, and the electrochemical jettisoning device 7 are connected in series on the same rope, and the rope needs to be kept taut during use. The specific lever arm ratio of the lever structure can be determined according to the actual application scenario, such as adaptive adjustment based on the strength parameters of the jettisoning rope and the fuse material. Its core goal is to reduce the tension borne by the jettisoning rope through the lever action to match the carrying capacity of the rope and the fuse material. Before use, the rope is slack, and the jettison block release hook 3 is open. During use, the jettison block 5 is suspended from the jettison block release hook 3 and temporarily secured with a latch. The rope is then passed through the acoustic release ring 1 and connected to one end of the tensioner 6. Simultaneously, plastic connectors are attached to the annular fuse structure of the electrochemical jettison device 7. One plastic connector is connected to the lander itself via a rope, while the other is connected to the other end of the tensioner 6. Once connected, the jettison block release hook 3 is tightened via the tensioner 6, and the latch is finally removed.

[0041] From a functional point of view, the acoustic releaser 1 and the electrochemical load-releasing device 7 are arranged in parallel. When either of them performs the load-releasing action, the rope can be relaxed, thereby achieving the load-releasing and floating of the deep-sea lander. Even if the two types of devices trigger the fuse at the same time, it will not affect the load-releasing effect. As long as the rope can be relaxed, the load-releasing can be completed. In the redundant structure of actual application, the trigger priority can be set manually according to specific needs: for example, if the mission time is prioritized, the electrochemical load-releasing device can be triggered by the end-of-work signal of the equipment, so that it can act before the acoustic releaser is manually triggered. The electrochemical load-releasing device 7 can realize timed load-releasing, event load-releasing and emergency load-releasing: it can be fixed by setting the load-releasing time through the system, and can also be controlled by the deep-sea lander. The load-releasing action is performed when the external equipment completes its work or when the deep-sea lander system has an abnormality, which effectively improves the safety and practicality of the lander. Compared with traditional electromagnetic load-releasing devices, the electrochemical load-releasing device of the present invention has significant advantages: the electromagnetic load-releasing device requires long-term continuous power supply to generate magnetic force to pull the load block, and its power consumption is directly related to the weight of the load block - the larger the load weight, the greater the current required, and the energy consumption accumulates as the working time increases; at the same time, the electromagnetic load-releasing device has a complex structure and a large volume, and the volume restrictions are more stringent in the deep-sea high-pressure environment. In addition, in long-term use, the complexity of the mechanical structure can easily lead to increased uncertainty and affect reliability. The electrochemical load-releasing device of the present invention is only energized for a short time when the load is triggered, and does not require long-term continuous power supply. The static power consumption is negligible, and it has a simple structure and a compact size. It can better adapt to the deep-sea high-pressure environment, and its reliability in long-term use is more guaranteed.

[0042] The electrochemical method is mainly realized by a water-proof cable, an electrode 7-2, a stainless steel wire 7-5 or a steel wire rope 7-7, and has two design modes.

[0043] In the first mode, the stainless steel wire 7-5 is used as the fuse material: after vulcanization, the first water-proof cable 7-1 leads out two cable lines, one of which is connected with brass by vulcanization, and the other of which is connected with the stainless steel wire by vulcanization; the brass is installed on the lander and is ensured not to contact any metal; the surface of the stainless steel wire is coated with an epoxy resin anticorrosive layer to prevent corrosion caused by direct contact with seawater. In use, the tail of the stainless steel wire is connected into a ring-shaped fuse structure, and the epoxy resin layer of 3-5 mm in the center position is removed as a fuse point 7-3. When the electrochemical unloading device performs the unloading action, the fuse point in contact with seawater will be fused in a few minutes, so that the rope is loosened to achieve unloading. Due to the torque effect of the unloading block through the unloading block release hook, the relatively thin stainless steel wire can provide the required pressure; a single electrochemical unloading device can vulcanize multiple stainless steel wires, and after each use, the used part is cut off, so that multiple uses can be achieved.

[0044] In the second mode, the first water-proof cable 7-1, brass, the second water-proof cable 7-6 and the steel wire rope 7-7 are used: after vulcanization, the first water-proof cable 7-1 leads out two cable lines, one of which is connected with brass by vulcanization, and the other of which leads out a water-proof connector which can be connected with the second water-proof cable 7-6. In use, the coating layer of 3-4 mm in the center of the steel wire rope is removed as a fuse point 7-3, and then the steel wire rope is wound into a ring-shaped fuse structure, so that the head and tail thereof are vulcanized and fixed with the second water-proof cable 7-6. The steel wire rope is usually thicker and can bear greater weight; after use, only the part of the second water-proof cable 7-6 vulcanized with the steel wire rope needs to be cut off, and the second water-proof cable 7-6 can still be used by vulcanization.

[0045] The cross-sectional area of the fuse structure (such as the stainless steel wire or the steel wire rope) can be selected according to the weight of the unloading block. Without redundancy design and lever structure, only relying on the single work of the electrochemical unloading device, due to the need to bear higher load, the cross-sectional area of the fuse structure can be increased or a material with higher strength can be selected.

[0046] The two modes have their own characteristics: the first mode is simple to operate and does not need complex operation before next use, but the epoxy resin coating layer is easy to fall off or be scratched, which may cause the whole stainless steel wire to fail, and finally may damage the brass and the main body of the first water-proof cable 7-1 of the electrochemical unloading device; the steel wire rope of the second mode is more reliable, only consumes part of the second water-proof cable 7-6 each time, does not consume the main body, but needs to be vulcanized and fixed after each use, and the use is relatively complex.

[0047] During operation, the fuse material is forced to become the anode by applying electricity, accelerating the electrochemical corrosion process. The melting time is primarily related to the length of the melting point, the characteristics of the fuse material, the contact state between the fuse materials, and the current intensity. In actual use, sufficient margin should be reserved to ensure reliable melting. From an energy-saving perspective, monitoring current mutations can be used to determine the melting state, which can reduce unnecessary energy consumption.

[0048] In addition, brass can also be replaced by other corrosion-resistant and highly conductive metal materials, such as stainless steel, titanium alloy, etc.

[0049] In summary, the present invention provides a jettisoning system for underwater equipment, the core advantage of which is that it can significantly improve the safety and reliability of recovering underwater equipment, such as deep-sea landers. This system connects an acoustic releaser and an electrochemical jettisoning device in parallel, ensuring that any jettisoning action by either device can loosen the rope, thereby jettisoning and buoying the deep-sea lander. Therefore, even if the acoustic releaser fails, the electrochemical jettisoning device can still release the jettisoning device in an emergency to allow the lander to float. After the lander completes its work, both devices can also trigger recovery in a timely manner, effectively avoiding the limitations of a single jettisoning method. It also eliminates the uncertainty of environmental influences on traditional acoustic releasers and the large size, high cost, and high static power consumption of electromagnetic jettisoning devices.

[0050] The electrochemical jettisoning device has multiple jettisoning functions. It can be programmed to jettison at a fixed time through the system, or it can be controlled by the deep-sea lander to execute event jettisoning or emergency jettisoning when external equipment completes its work or a system anomaly occurs, further enhancing the lander's flexibility in responding to different scenarios. This parallel jettisoning system not only enables rapid emergency jettisoning in the event of a lander anomaly, but also allows for rapid recovery after the mission is complete, significantly saving ship time and facilitating the next deployment of the equipment, comprehensively improving the safety, practicality, and reliability of the deep-sea lander.

[0051] In addition, the application scope of this electrochemical jettisoning device is not limited to deep-sea landers. It can also be used for any underwater equipment or platform that can dive and float by adjusting weight, helping these equipment to achieve timely and reliable recovery functions, and has broad practical value.

[0052] The above description further details the present invention in conjunction with specific / preferred embodiments, and the specific implementation of the present invention should not be construed as being limited to these descriptions. Persons skilled in the art will appreciate that, without departing from the spirit of the present invention, they may make various substitutions or modifications to the described embodiments, and these substitutions or modifications should be considered to fall within the scope of protection of the present invention. Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples" indicates that the specific features, structures, materials, or characteristics described in conjunction with such embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Persons skilled in the art may combine and assemble the different embodiments or examples described in this specification, as well as features of different embodiments or examples, without conflicting opinions. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications may be made herein without departing from the scope of protection of the patent application.

Claims

1. A jettisoning system for underwater equipment, characterized in that: include: An acoustic releaser (1), installed on the underwater equipment, is used to receive acoustic instructions to execute the jettisoning; An electrochemical load-rejection device (7) is installed on the underwater equipment and is used to perform load-rejection by fusing through electrochemical corrosion in seawater; A load-jetting actuator comprises a connected load-jetting rope (2) and a load-jetting block (5); the acoustic releaser (1) and the electrochemical load-jetting device (7) are connected in series via the load-jetting rope (2) and are connected together to the load-jetting block (5); A tensioner (6) connected to the throwing rope (2) and used to tighten the throwing rope (2) before throwing; The acoustic releaser (1) and the electrochemical load-releasing device (7) form a parallel redundant structure. When either one triggers a load-releasing action, the load-releasing rope (2) is relaxed, thereby releasing the load-releasing block (5).

2. The underwater equipment jettisoning system according to claim 1, characterized in that: The electrochemical load rejection device (7) comprises a watertight cable, an electrode (7-2) and a fuse structure made of a conductive material that can undergo electrochemical corrosion; The electrode (7-2) and the fuse structure are respectively connected to a power source via a watertight cable; the fuse structure is provided with an exposed fuse point (7-3) and is connected to a load-releasing rope (2); When powered on, current flows from the watertight cable to the electrode and the fuse structure, and the two form a conductive loop through seawater, causing electrochemical corrosion and melting of the fuse point, thereby relaxing the load-releasing rope (2) and releasing the load-releasing block (5).

3. The underwater equipment jettisoning system according to claim 2, characterized in that: The fuse structure is a stainless steel wire (7-5) with an anti-corrosion layer, and the fuse point (7-3) is formed by partially removing the anti-corrosion layer. The watertight cable includes a first watertight cable (7-1), and the first watertight cable is vulcanized to lead out two cable wires, one of which is vulcanized and connected to the electrode, and the other is directly connected to a single end of the stainless steel wire (7-5).

4. The underwater equipment jettisoning system according to claim 2, wherein: The fuse structure is a steel wire rope (7-7) with an anti-corrosion layer, and the fuse point (7-3) is formed by partially removing the anti-corrosion layer; the watertight cable comprises a first watertight cable (7-1) and a second watertight cable (7-6); the first watertight cable is vulcanized to lead out two cable wires, one of which is vulcanized and connected to the electrode, and the other leads out a watertight joint and is connected to the second watertight cable; the steel wire rope (7-7) is fixed at both ends by vulcanization and connected to the second watertight cable.

5. The underwater equipment jettisoning system according to any one of claims 2 to 4, characterized in that: The fuse structure is constructed in a ring shape and is respectively connected to the tensioner (6) and the underwater equipment body through the two insulating connectors (7-4).

6. The underwater equipment jettisoning system according to any one of claims 2 to 4, characterized in that: The material of the electrode (7-2) is brass, stainless steel or titanium alloy.

7. The underwater equipment jettisoning system according to any one of claims 1 to 4, characterized in that: The electrochemical load rejection device (7) is configured to be energized in response to a timing signal, an external control signal, or a system abnormality monitoring signal.

8. The underwater equipment jettisoning system according to any one of claims 1 to 4, characterized in that: The acoustic releaser (1) is installed on the top of the underwater equipment, and the electrochemical load-releasing device (7) is installed on the middle layer of the underwater equipment.

9. The underwater equipment jettisoning system according to any one of claims 1 to 4, characterized in that: The load-jetting actuator further comprises a load-jetting block release hook (3) and a release hook seat (4); The release hook seat (4) is fixed on a support column of the underwater equipment, and the throwing block release hook (3) is installed on the release hook seat (4) through a lever structure, so that when the throwing rope (2) is tensioned, the tension borne by the throwing rope (2) is smaller than the weight of the throwing block (5) through the lever action.

10. The underwater equipment jettisoning system according to claim 9, characterized in that: The load-dumping actuators are arranged in multiple groups and distributed on multiple support columns of the underwater equipment.

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